<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>
    *{
        margin:0;
        padding:0;
    }

    </style>
</head>


<body>
<form >
    <input type="text" id="uname">
    <input type="radio" value="man" name="sex">男
    <input type="radio" value="woman" name="sex" checked>女
</form>

<script type="text/javascript">
    var zzz=prompt('请输入账号');
    alert("您输入的数字*8="+(zzz*8));
</script>

</body>
</html>